Benchmark: Step through array in reverse order - reduceRight vs reverse

Script Preparation code:

var nums50 = Array.from({length:  50}, () => Math.random() * 100 |0)
var nums150 = Array.from({length: 150}, () => Math.random() * 100 |0)
var nums500 = Array.from({length: 500}, () => Math.random() * 100 |0)

Tests:

slice and reverse 50
nums50.slice().reverse().forEach(n => n**2)
reduceRight 50
nums50.reduceRight((_,n) => n**2, null)
slice and reverse 150
nums150.slice().reverse().forEach(n => n**2)
reduceRight 150
nums150.reduceRight((_,n) => n**2, null)
slice and reverse 500
nums500.slice().reverse().forEach(n => n**2)
reduceRight 500
nums500.reduceRight((_,n) => n**2, null)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
slice and reverse 50
reduceRight 50
slice and reverse 150
reduceRight 150
slice and reverse 500
reduceRight 500

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 6 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
slice and reverse 50	9229443.0 Ops/sec
reduceRight 50	13697970.0 Ops/sec
slice and reverse 150	4313971.0 Ops/sec
reduceRight 150	6833463.0 Ops/sec
slice and reverse 500	1591519.0 Ops/sec
reduceRight 500	2824343.0 Ops/sec

Step through array in reverse order - reduceRight vs reverse (version: 0)

Comparing performance of: slice and reverse 50 vs reduceRight 50 vs slice and reverse 150 vs reduceRight 150 vs slice and reverse 500 vs reduceRight 500

Created: one year ago by: Guest

Jump to the latest result

slice and reverse 50

reduceRight 50

slice and reverse 150

reduceRight 150

slice and reverse 500

reduceRight 500

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A